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Effect of bacterial endotoxin and middle ear effusion on ciliary activity: implications for otitis media

Mason, Paul S., Adam, Elizabeth, Prior, Matthew, Warner, John O. and Randall, Christopher J. (2002) Effect of bacterial endotoxin and middle ear effusion on ciliary activity: implications for otitis media The Laryngoscope, 112, (4), pp. 676-680.

Record type: Article


Objectives/Hypothesis: Otitis media with effusion (OME) is the most common cause of childhood deafness. The pathogenesis is not fully understood, especially the reasons for failure of mucociliary clearance of the middle ear. It is not clear whether the cilia function normally in the middle ear and eustachian tube in the chronic phase of otitis media with effusion. However, impaired ciliary function in primary ciliary dyskinesia is known to be frequently associated with the development of otitis media with effusion. We hypothesized that endotoxin or the bacterial products in middle ear fluid in otitis media with effusion would adversely affect ciliary activity, thereby contributing to the pathogenesis of the disease.
Study Design: Laboratory-based study of human ciliary activity with reference to otitis media with effusion.
Methods: We have studied the activity of human adenoidal cilia under various conditions. Ciliary activity in the presence of Haemophilus influenzae endotoxin additions (at varying concentrations) to cultured adenoidal explants has been measured. In addition, ciliary activity of these explants was also observed after addition of middle ear effusion aspirated from patients.
Results: We have shown that endotoxin in concentrations far in excess of those found in the middle ear with chronic otitis media with effusion had no effect on ciliary activity. Furthermore, ciliary activity was completely unaffected by the presence of middle ear effusion.
Conclusion: There is no evidence that ciliary activity is reduced by the constituents of middle ear fluid in chronic otitis media with effusion.

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Published date: 2002


Local EPrints ID: 27257
ISSN: 0023-852X
PURE UUID: f8c7f04b-a246-4730-92ed-e84bd83b1994

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Date deposited: 27 Apr 2006
Last modified: 17 Jul 2017 16:05

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Author: Paul S. Mason
Author: Elizabeth Adam
Author: Matthew Prior
Author: John O. Warner
Author: Christopher J. Randall

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